> can’t get water
California has plenty of water, it's just allocated poorly. Agriculture uses most of it. And don't give that silly "but we need food!!!" response, nobody's gonna starve if water prices go up a bit.
> is subject to deveststing earthquakes
Doesn't seem to have impacted Tokyo too badly. Really, modern buildings don't have much of a problem here. If anything, the wildfires seem to cause more trouble than the earthquakes.
> is overpopulated in terms of what can be sustained in a sane manner over time
Nah, California really isn't that densely populated. Besides, denser-type development would be mean less resource usage, person for person.
> Even if you reject that premise, what you call “unnaturally restricted growth” is being applied to a truly massive city. What would unrestricted growth look like exactly? After all was said and done, would it still be such a desirable place to live?
Vienna is mostly 5 or 6 story buildings and scores extremely high on livability ratings, much higher than LA. I live in Munich right now which is similar and it's quite nice, so I'd say: yes.
> Are you so sure the solution for everyone who isn’t looking for a high-end techie salary (i.e. most people) isn’t for the industry to be less concentrated in one city?
Agglomeration of an industrial sector in a particular area is normal and fine. It happens, even though companies have to pay higher rents and higher salaries, because it's advantageous to productivity to concentrate a wide variety of specialists for a certain field in a particular area. If companies want to spread out more, of course that's fine, but forcing them to do so would almost certainly hurt their performance. If you want lots more high-paying jobs, maybe not the best idea.
> The thing is, between people who spent a lifetime in a city not wanting it to turn into blocks of high-rises
It's pretty amusing to see so many people who think a 5 story building qualifies as a "high rise". 5 stories is nowhere close to that, chief.
> there really is more than the dichotomy of “the virtuous” and “the NIMBY.”
Yeah, but California (and really the US as a whole) is chock full of NIMBYs whose policies definitely hurt others. Rent prices are a big problem right now, especially in any area that's booming, not just California, and the two big problems are incredibly restrictive zoning regulations, and no serious public housing efforts (and the latter is also impacted by the former anyway).
> I hold out some hope that it can get some thoughtful rebuttals too.
Perhaps you should first put forth some thoughtful arguments then? I don't see anything that can't be easily dismissed by anyone who's actually put forth a modicum of amateur research into this area.
I read most of Cadillac Desert back in high school for one of my classes, I don't recall anything that sounds like it'd be unsolvable now. If you remember anything that would actually be hard to deal with, by all means, bring it up. So far everything you've mentioned is fairly trivial.